resize c Drive?

Hi
I just bought Acronis Disk Suite 10 to do just one thing, make my c drive larger.
Now I can't seem to do it and I am covinced that it will allow any other drive to be resized but not the c drive.
Any help?
Thanks
MachineGun
I

If there is free space available, try booting from the rescue cd and trying to do the resize. Sometimes it works better than initiating the procedure from in Windows.

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I just bought it today and downloaded ver 2117.
Then I found out that I had to update to ver 2160.
Why in the world did they not give me the newest version in the first place.
I have read in this forum that ver 2160 is still not fully finished and compatable with Vista.
I was not sure that it was possible to resize the primery, and that was all I realy wanted to know.
When I try to resize the c drive it goes through all the reboots and then when it is finished, nothing has been changed.
ThanksMachineGun